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Standard IX
Maths
Parallel Lines
Question
In figure, $$line\ XY\ ||\ line \ PQ$$ and we have $$\angle ALY=(2x-15)^o, \angle LMQ=(x+40)^o$$, find x.
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Solution
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We have $$\angle ALY=(2x-15)^0$$ and $$\angle LMQ=(x+40)^0$$
Also, $$line\ XY\ ||\ line \ PQ$$
$$\therefore$$ $$\angle XLM$$ and $$\angle LMQ$$ are corresponding angles.
and corresponding angles on parallel lines are congruent.
$$\therefore \angle ALY=\angle LMQ$$
$$\therefore 2x-15=x+40\\$$
$$\Rightarrow 2x-x=40+15\\$$
$$\therefore x=55^0$$
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Similar Questions
Q1
In Fig., we have
(i) ∠MLY = 2 ∠LMQ, find ∠LMQ.
(ii) ∠XLM = (2x − 10)° and ∠LMQ = x + 30°, find x.
(iii) ∠XLM = ∠PML, find ∠ALY
(iv) ∠ALY = (2x − 15)°, and ∠LMQ = (x + 40)°, find x